Which of these shapes have rectangular cross sections when they are cut perpendicular to the base? Select three options

Mathematics

1 answer:

Drupady [299]3 years ago

5 0

Answer:

can you give me choices?

Step-by-step explanation:

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How much times dose 9 go into 125???

lesya692 [45]

$125:9=\frac{125}{9}=\frac{90+36-1}{9}=\frac{90}{9}+\frac{36}{9}-\frac{1}{9}=10+4-\frac{1}{9}=14-\frac{1}{9}\\\\=13\frac{8}{9}\approx14\\\\Answer:\ 9\ go\ into\ 125:\ 13\frac{8}{9}\ times,\ approximate\ to\ 14$

7 0

3 years ago

A particular concentration of a chemical found in polluted water has been found to be lethal to 40% of the crayfish that are exp

Jet001 [13]

Answer:

a) $P(X=13)=(24C13)(0.4)^{13} (1-0.4)^{24-13}=0.0608$

$P(X=17)=(24C17)(0.4)^{17} (1-0.4)^{24-17}=0.0017$

$P(X=13 U X=17) = 0.0608+0.0017=0.0624$

b) $P(X \geq 17)=0.000427$

c) $P(X \geq 16)= 1-0.000427=0.9996$

d) $E(X)= np = 22*0.4=8.8$

e) $Var(X) = np(1-p)= 22*0.4*(1-0,4)=5.28$

Step-by-step explanation:

1) Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

2) Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=24, p=0.4)$